J. Mater. Sci. Technol. ›› 2025, Vol. 214: 1-10.DOI: 10.1016/j.jmst.2024.05.076

• Research Article •     Next Articles

Hierarchical porous SiCnws/SiC composites with one-dimensional oriented assemblies for high-temperature broadband wave absorption

Huiying Ouyanga,b, Xiao Youa,*, Yuanhang Yanga,c, Meihan Rena,b, Qiuqi Zhanga,d, Ruixiang Denge, Xiangyu Zhanga, Jinshan Yanga, Shaoming Donga,f,*   

  1. aState Key Laboratory of High Performance Ceramics & Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;
    bSchool of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China;
    cSchool of Microelectronics, Shanghai University, Shanghai 200444, China;
    dUniversity of Chinese Academy of Sciences, Beijing 100049, China;
    eKey Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;
    fCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2024-04-15 Revised:2024-05-23 Accepted:2024-05-28 Published:2025-04-10 Online:2025-04-05
  • Contact: *E-mail addresses: youxiao@mail.sic.ac.cn (X. You), smdong@mail.sic.ac.cn (S. Dong)

Abstract: The research on high-performance electromagnetic wave absorption materials with high-temperature and oxidative stability in extreme environments is gaining popularity. Herein, the lightweight silicon carbide nanowires (SiCnws)/SiC composites are fabricated with in-situ SiC interface on one-dimensional oriented SiCnws skeleton, which collaborative configuration by 3D printing and freeze casting assembly. The constructed porous structure optimizes the impedance matching degree and scattering intensity, the maximum effective absorption bandwidth (EABmax) of 5.9 GHz and the minimum reflection loss (RLmin) of -41.4 dB can be realized. Considering the inherent oxidation resistance of SiC, the composites present well-maintained absorption performance at 600 °C. Even at 1100 °C, the EABmax of 4.9 GHz and RLmin of -30.4 dB also demonstrate the high-temperature absorption stability of the composites, indicating exceptional wave absorption properties and thermal stability. The slight attenuation can be attributed to the decrease in impedance matching capability accompanying the elevated dielectric constant. This work clarifies the impact of structure and component synergy on wave absorption behavior, and offers a novel approach to producing high-performance and high-temperature resistance ceramic-based electromagnetic wave absorption materials suitable for extreme environments.

Key words: Electromagnetic wave absorption, Porous structure, Interface, SiCnws/SiC composites, High-temperature resistance